Huerta faces Rep. David Valadao (R-Hanford) in the Central Valley district, a major agricultural region with a population that is nearly 75% Latino.

"I am proud to support Emilio Huerta for California’s 21st Congressional District. From his work in the Farm Workers movement with Cesar Chavez and his mother, Dolores Huerta, to his career as a civil rights and non-profit attorney, Emilio has spent his entire life working for poor and low-income families throughout California and the Southwest," Clinton said in a statement released by the Huerta campaign.

Huerta's mother, labor rights icon Dolores Huerta, has been a visible Clinton surrogate for months, visiting Latino communities across the country to rally a group that historically votes at lower rates but that may feel new motivation following rhetoric about Mexicans and immigrants from Republican presidential nominee Donald Trump.